Dynamic single-unit representation of induction motor groups

The paper describes a method of representing a group of induction motor loads by a single-unit equivalent. The dynamic performance of the composite group following supply disturbances is examined using the single unit model. The representation employs the induction motor steady state equivalent circuit mad allows for effects of inertia and mechanical load characteristics. Experimental results are presented and compared with corresponding theoretical results using the proposed method as well as classical techniques of analysis. Sudden and gradual supply disturbances are considered, and different load torque-speed characteristics.